What was the importance of the U. S. Supreme Court case Marbury v. Madison in determining the role of the Supreme Court in American government?

Above, a portrait of plaintiff William Marbury. Marbury v. Madison, arguably the most important case in Supreme Court history, was the first U.S. Supreme Court case to apply the principle of "judicial review" -- the power of federal courts to void acts of Congress in conflict with the Constitution.

Explanation:Above, a portrait of plaintiff William Marbury. Marbury v. Madison, arguably the most important case in Supreme Court history, was the first U.S. Supreme Court case to apply the principle of "judicial review" -- the power of federal courts to void acts of Congress in conflict with the Constitution.

i think it was   tsar alexander ii

not sure might be he acquired the entire oregon territory from great britain